A) CHARACTERISTICS :-

1. High BOD is found.
2. The ratio of BOD/COD is high.
3. Strong colour :The colour of the effluent is dark.
4. The pH value is High.
5. High sodium content are more in the effluent.
6. It is Lignin , and high resistant to biological treatment.

B) Treatment Method :-

1. Chemical recovery of lignin
2. Lime treatment for colour removal.
3. Physical treatment.
4. Biological treatment.

Diagram :-

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